高等学校化学学报

高等学校化学学报 ›› 1985, Vol. 6 ›› Issue (2): 131.

• 研究论文 • 上一篇    下一篇

中位-取代的八乙基卟啉的质子化常数研究

龚良初   

  1. 华东师范大学化学系
  • 收稿日期:1983-08-10 出版日期:1985-02-24 发布日期:1985-02-24

Study on Protonation Constants of Meso-Substituted Octaethylporphyrins

Gong Liangchu   

  1. Department of Chemistry, Enst China Normal University, Shanghai
  • Received:1983-08-10 Online:1985-02-24 Published:1985-02-24

PDF (PC)

摘要： 本文报导用Aronoff法测定的十五种卟啉的质子化常数(K3和K4),并讨论了中位取代基(硝基、氯和甲氧基)对常数的影响。

Abstract: The protonation constants (K3 and K4) of 15 porphyrins were determined by Aronoff method, being in the range of 4.3-6.61gKvalues.When the difference between 1gK3 and 1gK4 is larger than l,no double protonated cation (PH42+) is formed before the simple protonated cation(PH3+) has been completely formed; otherwise the formation processes of PH3+ and PH42+ mix up to some extent.Strong electron with drawing meso-nitro groups make protonation constants decrease through inductive effect while meso-chlorine atoms increase the constants due to the steric effect.

TrendMD: